From b7d2fb5eb9c55f95048444bb6703abbf2fe14c5c Mon Sep 17 00:00:00 2001
From: Amber Brown <hawkowl@atleastfornow.net>
Date: Thu, 13 Sep 2018 19:59:32 +1000
Subject: [PATCH] Remove some superfluous logging (#3855)

---
 .circleci/merge_base_branch.sh |  2 +-
 changelog.d/3855.misc          |  1 +
 synapse/__init__.py            | 10 ++++++++++
 synapse/config/logger.py       | 17 ++++++++++++++++-
 4 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100644 changelog.d/3855.misc

diff --git a/.circleci/merge_base_branch.sh b/.circleci/merge_base_branch.sh
index 2d700dbf11..4e297d77da 100755
--- a/.circleci/merge_base_branch.sh
+++ b/.circleci/merge_base_branch.sh
@@ -4,7 +4,7 @@ set -e
 
 # CircleCI doesn't give CIRCLE_PR_NUMBER in the environment for non-forked PRs. Wonderful.
 # In this case, we just need to do some ~shell magic~ to strip it out of the PULL_REQUEST URL.
-echo 'export CIRCLE_PR_NUMBER="${CIRCLE_PR_NUMBER:-${CIRCLE_PULL_REQUEST##*/}}"' >> "$BASH_ENV"
+echo 'export CIRCLE_PR_NUMBER="${CIRCLE_PR_NUMBER:-${CIRCLE_PULL_REQUEST##*/}}"' >> $BASH_ENV
 source $BASH_ENV
 
 if [[ -z "${CIRCLE_PR_NUMBER}" ]]
diff --git a/changelog.d/3855.misc b/changelog.d/3855.misc
new file mode 100644
index 0000000000..a25bb020ba
--- /dev/null
+++ b/changelog.d/3855.misc
@@ -0,0 +1 @@
+Removed some excess logging messages.
\ No newline at end of file
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 65a2b894cc..9dbe0b9f10 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -17,4 +17,14 @@
 """ This is a reference implementation of a Matrix home server.
 """
 
+try:
+    from twisted.internet import protocol
+    from twisted.internet.protocol import Factory
+    from twisted.names.dns import DNSDatagramProtocol
+    protocol.Factory.noisy = False
+    Factory.noisy = False
+    DNSDatagramProtocol.noisy = False
+except ImportError:
+    pass
+
 __version__ = "0.33.4"
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index 3f187adfc8..e9a936118d 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -227,7 +227,22 @@ def setup_logging(config, use_worker_options=False):
     #
     # However this may not be too much of a problem if we are just writing to a file.
     observer = STDLibLogObserver()
+
+    def _log(event):
+
+        if "log_text" in event:
+            if event["log_text"].startswith("DNSDatagramProtocol starting on "):
+                return
+
+            if event["log_text"].startswith("(UDP Port "):
+                return
+
+            if event["log_text"].startswith("Timing out client"):
+                return
+
+        return observer(event)
+
     globalLogBeginner.beginLoggingTo(
-        [observer],
+        [_log],
         redirectStandardIO=not config.no_redirect_stdio,
     )